from mmap import mmap, ACCESS_READ
from xlrd import open_workbook

print open_workbook ("simple.xls")
with open ("simple.xls", "rb") as f:
	print open_workbook(file_contents=mmap(f.fileno(), 0, access = ACCESS_READ)
astring = open ("simple.xls", "rb").read()
print open_workbook(file_contentes = astring)
